NCERT Solutions Class 6 Science Chapter 8

NCERT Solutions for Class 6 Science Chapter 8

NCERT Class 6 Science Chapter 8 teaches students about bones, cartilage, and the formation of the skeleton in the human body. It also describes the skull, backbone, alternate contraction, and locomotion of insects, fish, earthworms, and snails. To help students revise their learning from the chapter and prepare for the exams, there are practice questions given at the end of the chapter. 

Students can refer to NCERT Solutions for Class 6 Science Chapter 8 Body Movements by Extramarks to find detailed answers and explanations to the practice questions. The solutions are prepared by subject matter experts as per the latest guidelines by CBSE. Students can access the solutions on the website and app of Extramarks.

NCERT Class 6 Science Other Chapters Solutions

NCERT Solutions for Class 6 Science Chapter 8 – Body Movements 

The Class 6 Science Chapter 8 – Body Movements covers the following topics:

8.1 Human Body and its Movements

8.2 Ball and Socket Joints

8.3 Pivotal Joint 

8.4 Hinge Joints 

8.5 Fixed Joints 

8.6 Gait of Animals – Earthworm, snail, cockroach, fish and birds

8.7 How do snakes move?

8.1 Human Body and its Movements 

Each part of the human body system is responsible for performing different bodily functions. An organ is made from a group of tissues that work together for the proper functioning of our body. Human body has an internal framework that is made of bones and cartilage. This framework is called the skeletal system. It provides stability to the body, helping it move. The skull, hip bones, shoulder, chest bone, backbone, shinbone and arm bones are different parts of the skeletal system.

82. Socket and Ball Joints

As explained in Body Movements Class 6, there are different kinds of joints in human body. When a round end bone connects to another bone through a cavity, this connection is called a ball and socket joint. This joint allows bones to move in every direction.

8,3 Pivotal Joints 

A pivotal joint looks like a ball on a stick. It allows rotation in diagonal and vertical directions. A pivotal joint is present between the backbone and the skull. 

8.4 Hinge Joints 

The hinge joint is very similar to the hinges attached to the door. It can move along a fixed axis and allows extension and flexion in a particular plane. The elbow joint is a hinge joint.

8.5 Fixed Joints 

Fixed joints are where two bones join, but still, movement isn’t possible. An example of a fixed joint is your jaw. When you try moving the upper jaw, only the lower jaw will move. The skull is also an example of a fixed joint.

8.6 Gait of Animals 

The pattern followed by limbs while moving during locomotion on a solid substrate is called gait. Animals use different types of gaits, such as those based on speed, energy efficiency, terrain and need for maneuvering, depending on their body structure.

• Earthworm 

Earthworms can move with the help of setae. The body of an earthwork is made up of multiple rings that are joined by their ends. As there are no bones in the body of earthwork, it is the muscles that help them extend and shorten when moving forward in short distances.

• Snail 

The shell of a snail is its outer skeleton and is not made up of bones. A snail moves around with its shell and uses its head for movement. The feet of a snail are thick and made up of strong muscles. It has mucus used as lubrication, which makes the movement easier. Mucus also reduces the risk of injury when a snail passes through sharp objects.

• Cockroach

Like many insects, cockroaches can also climb and fly. They have six pairs of legs in total, with three pairs on each side. The legs help cockroaches move fast. The outer part of the body of cockroaches has a hard skeleton made of different units, which further helps cockroaches in moving.

• Fish

A fish has a streamlined body so that it can move freely through water. Its shape also helps in the movement. As the tail and head of a fish are shorter and narrower than its middle body, these help in penetrating through water and moving forward.

• Birds

Birds have four legs and a pair of wings that help them walk and fly. Birds can fly because of their light and hollow bones. Some birds can also swim. The absence of a urinary bladder also lightens the body and aids in flight.

8.7 How do snakes move?

Snakes move in loops while making a zigzag or ‘S’ pattern. They do not have many bones, but the muscles in snakes give them the strength to move. Every loop makes a step, and the snake pushes itself forward. The muscles interconnect with the skin and ribs.

Key Features of NCERT Solutions for Class 6 Science Chapter 8 

If students are looking for explanations or detailed answers to the questions of Chapter 8 Body Movements, NCERT Science Class 6, the students can find them here. The answers are to the point and well-structured, which helps students learn easily. Some of the key features of Chapter 8 Science Class 6 by Extramarks are as follows:

• The solutions are prepared by subject matter experts in the industry. 
• These solutions are formatted in such a way that they answer every query of a student. 
• Difficult answers are explained step-by-step, which reduces mental overload.